Unable to install the Gateway Release Upgrade Patches if the Monthly Platform Patch (MPP) has been installed since its March 2018 release.
All form factors of the CA API Gateway with MPP installed since March
A recent change in the Monthly Platform Patch (MPP) was made to keep multiple versions of kernel RPMs to allow for rollback. This change voids some expectations in the Gateway Release Upgrade Platform patch and will cause the upgrade to fail.
This issue has been resolved in the CA API Gateway 9.4.00 version, which will be available shortly.